6.5.1.1 Fastening
WARNING:
Risk of serious personal injury or property damage. Fasteners such as bolts and nuts are criti-
cal to the safe and reliable operation of the product. Ensure appropriate use of fasteners during
installation or reassembly of the unit.
•
Use fasteners of the proper size and material only.
• Replace all corroded fasteners.
• Ensure that all fasteners are properly tightened and that there are no missing fasteners.
6.5.2 Shaft and sleeve replacement guidelines
Two types of sleeves
The 3198 and CV 3198 is offered with either a metallic sleeve that uses the standard 3196 shaft or a
PTFE sleeve. The PTFE sleeve requires a special shaft and a different inboard labyrinth oil seal.
Shaft measurements check
Replace the shaft (122) if any measurements exceed acceptable values. See Bearing fits and toleran-
ces.
Figure 75: Shaft measurements check
Straightness check
Replace the shaft (122)
if runout exceeds the values in this table:
Table 17: Shaft runout tolerances for sleeve fit and coupling fit
Sleeve fit in millimeters | inches Coupling fit in millimeters | inches
With sleeve 0.025 | 0.001 0.025 | 0.001
Without sleeve 0.051 | 0.002 0.025 | 0.001
Shaft and sleeve check
Figure 76: Shaft and sleeve check
•
Check the shaft and sleeve (126) surface for grooves and pitting.
6.5 Pre-assembly inspections
Model NM 3196 i-FRAME Installation, Operation, and Maintenance Manual 95
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